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  • ffmpeg doesn't detect the subtitle format (webvtt) and refuses to copy it

    29 novembre 2023, par Thomas

    I am trying to re-encode the audio on some video files.
I want to copy the video and subtitles without touching them, however, ffmpeg doesn't detect the format of the subtitle (which is webvtt) and refuses to do anything.

    



    fmpeg -copy_unknown -analyzeduration 2000M -probesize 2000M -i input.mkv -map_metadata 0 -map 0 -c copy -c:a:0 aac -b:a 384k output.mkv

    



    [matroska,webm @ 0x5597558e4040] Unknown/unsupported AVCodecID S_TEXT/WEBVTT.
[matroska,webm @ 0x5597558e4040] Could not find codec parameters for stream 2 (Subtitle: none): unknown codec
Consider increasing the value for the 'analyzeduration' and 'probesize' options
Guessed Channel Layout for Input Stream #0.1 : 5.1
Input #0, matroska,webm, from 'input.mkv':
  Metadata:
    encoder         : libebml v1.3.9 + libmatroska v1.5.2
    creation_time   : 2020-03-05T09:03:02.000000Z
  Duration: 00:56:33.26, start: 0.000000, bitrate: 3597 kb/s
    Stream #0:0: Video: h264 (High), yuv420p(progressive), 1920x1080 [SAR 1:1 DAR 16:9], 23.98 fps, 23.98 tbr, 1k tbn, 47.95 tbc (default)
    Metadata:
      BPS-eng         : 3340067
      DURATION-eng    : 00:56:33.140000000
      NUMBER_OF_FRAMES-eng: 81354
      NUMBER_OF_BYTES-eng: 1416664616
      _STATISTICS_WRITING_APP-eng: mkvmerge v38.0.0 ('The Silent Type') 64-bit
      _STATISTICS_WRITING_DATE_UTC-eng: 2020-03-05 09:03:02
      _STATISTICS_TAGS-eng: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
    Stream #0:1: Audio: eac3, 48000 Hz, 5.1, fltp (default)
    Metadata:
      BPS-eng         : 256000
      DURATION-eng    : 00:56:33.248000000
      NUMBER_OF_FRAMES-eng: 106039
      NUMBER_OF_BYTES-eng: 108583936
      _STATISTICS_WRITING_APP-eng: mkvmerge v38.0.0 ('The Silent Type') 64-bit
      _STATISTICS_WRITING_DATE_UTC-eng: 2020-03-05 09:03:02
      _STATISTICS_TAGS-eng: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
    Stream #0:2(eng): Subtitle: none (default)
    Metadata:
      BPS-eng         : 38
      DURATION-eng    : 00:54:47.388000000
      NUMBER_OF_FRAMES-eng: 514
      NUMBER_OF_BYTES-eng: 15766
      _STATISTICS_WRITING_APP-eng: mkvmerge v38.0.0 ('The Silent Type') 64-bit
      _STATISTICS_WRITING_DATE_UTC-eng: 2020-03-05 09:03:02
      _STATISTICS_TAGS-eng: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES

Stream mapping:
  Stream #0:0 -> #0:0 (copy)
  Stream #0:1 -> #0:1 (eac3 (native) -> aac (native))
  Stream #0:2 -> #0:2 (copy)

[aac @ 0x5597b06ae000] Using a PCE to encode channel layout "5.1(side)"
[matroska @ 0x5597b06ab540] Subtitle codec 0 is not supported.
Could not write header for output file #0 (incorrect codec parameters ?): Function not implemented
Error initializing output stream 0:1 -- 
[aac @ 0x5597b06ae000] Qavg: -nan
Conversion failed!


    



    VLC shows it as WebVTT and displays the subtitles correctly :

    



    VLC shows as WebVTT

    



    MediaInfo also detects properly as webvtt :

    



    Text
ID                                       : 3
Format                                   : S_TEXT/WEBVTT
Codec ID                                 : S_TEXT/WEBVTT
Duration                                 : 54 min 47 s
Bit rate                                 : 38 b/s
Count of elements                        : 514
Stream size                              : 15.4 KiB (0%)
Language                                 : English
Default                                  : Yes
Forced                                   : No


    



    My ffmpeg was built with webvtt :

    



    $ ffmpeg -codecs | grep VTT
ffmpeg version n4.2.2 Copyright (c) 2000-2019 the FFmpeg developers
  built with gcc 9.3.0 (Arch Linux 9.3.0-1)
  configuration: --prefix=/usr --disable-debug --disable-static --disable-stripping --enable-fontconfig --enable-gmp --enable-gnutls --enable-gpl --enable-ladspa --enable-libaom --enable-libass --enable-libbluray --enable-libdav1d --enable-libdrm --enable-libfreetype --enable-libfribidi --enable-libgsm --enable-libiec61883 --enable-libjack --enable-libmfx --enable-libmodplug --enable-libmp3lame --enable-libopencore_amrnb --enable-libopencore_amrwb --enable-libopenjpeg --enable-libopus --enable-libpulse --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libv4l2 --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxcb --enable-libxml2 --enable-libxvid --enable-nvdec --enable-nvenc --enable-omx --enable-shared --enable-version3
  libavutil      56. 31.100 / 56. 31.100
  libavcodec     58. 54.100 / 58. 54.100
  libavformat    58. 29.100 / 58. 29.100
  libavdevice    58.  8.100 / 58.  8.100
  libavfilter     7. 57.100 /  7. 57.100
  libswscale      5.  5.100 /  5.  5.100
  libswresample   3.  5.100 /  3.  5.100
  libpostproc    55.  5.100 / 55.  5.100
 DES... webvtt               WebVTT subtitle


    



    How can I tell ffmpeg "this is webvtt, just copy it please !" ?

    



    EDIT : RESOLVED (thanks @Gyan)

    



    To force the decoder, -c:s webvtt must be set before the input :
fmpeg -analyzeduration 50M -probesize 50M -c:s webvtt -i input.mkv ...

    


  • ffmpeg - 'hevc' codec changed to 'rawvideo' after copying video codec

    11 mars 2021, par Md Yeamin

    I am trying to convert some mkv videos with hevc codec to avi format. For this I run the following command :

    


    ffmpeg -i input.mkv -vcodec copy -acodec copy out.avi


    


    For some video this command works without any issue. But in some cases video does converted, but I can not play those files in any video player. I've tried several video players including VLC, SMPlayer, Deepin Movie etc.

    


    After looking into the video codec of converted video I can see that the video codec got transformed from hevc to rawvideo. Hers is the stream information of the original and the converted video files :

    


    Input File

    


    ffmpeg version 4.2.4-1ubuntu0.1 Copyright (c) 2000-2020 the FFmpeg developers
  built with gcc 9 (Ubuntu 9.3.0-10ubuntu2)
  configuration: --prefix=/usr --extra-version=1ubuntu0.1 --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --arch=amd64 --enable-gpl --disable-stripping --enable-avresample --disable-filter=resample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libaom --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libcodec2 --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libjack --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librsvg --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-lv2 --enable-omx --enable-openal --enable-opencl --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-nvenc --enable-chromaprint --enable-frei0r --enable-libx264 --enable-shared
  libavutil      56. 31.100 / 56. 31.100
  libavcodec     58. 54.100 / 58. 54.100
  libavformat    58. 29.100 / 58. 29.100
  libavdevice    58.  8.100 / 58.  8.100
  libavfilter     7. 57.100 /  7. 57.100
  libavresample   4.  0.  0 /  4.  0.  0
  libswscale      5.  5.100 /  5.  5.100
  libswresample   3.  5.100 /  3.  5.100
  libpostproc    55.  5.100 / 55.  5.100
[matroska,webm @ 0x561d8e639600] Could not find codec parameters for stream 2 (Subtitle: hdmv_pgs_subtitle (pgssub)): unspecified size
Consider increasing the value for the 'analyzeduration' and 'probesize' options
Input #0, matroska,webm, from 'PE2_Leopard_4K_hevc_dts.mkv':
  Metadata:
    title           : Planet Earth II S01E01 4K
    encoder         : libebml v1.3.5 + libmatroska v1.4.8
    creation_time   : 2017-10-29T06:31:02.000000Z
  Duration: 00:00:04.22, start: 0.000000, bitrate: 46848 kb/s
    Chapter #0:0: start 0.000000, end 4.216000
    Metadata:
      title           : 00:00:00.000
    Stream #0:0: Video: hevc (Main 10), yuv420p10le(tv, bt2020nc/bt2020/smpte2084), 3840x2160 [SAR 1:1 DAR 16:9], 23.98 fps, 23.98 tbr, 1k tbn, 23.98 tbc (default)
    Metadata:
      BPS             : 44365437
      BPS-eng         : 44365437
      DURATION        : 00:00:04.212000000
      DURATION-eng    : 00:00:04.212000000
      NUMBER_OF_FRAMES: 101
      NUMBER_OF_FRAMES-eng: 101
      NUMBER_OF_BYTES : 23358403
      NUMBER_OF_BYTES-eng: 23358403
      _STATISTICS_WRITING_APP: mkvmerge v16.0.0 ('Protest') 64-bit
      _STATISTICS_WRITING_APP-eng: mkvmerge v16.0.0 ('Protest') 64-bit
      _STATISTICS_WRITING_DATE_UTC: 2017-10-29 06:31:02
      _STATISTICS_WRITING_DATE_UTC-eng: 2017-10-29 06:31:02
      _STATISTICS_TAGS: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
      _STATISTICS_TAGS-eng: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
    Stream #0:1(eng): Audio: dts (DTS-HD MA), 48000 Hz, 5.1(side), s16p (default)
    Metadata:
      title           : DTS-HD MA 5.1
      BPS             : 2506995
      BPS-eng         : 2506995
      DURATION        : 00:00:04.214000000
      DURATION-eng    : 00:00:04.214000000
      NUMBER_OF_FRAMES: 395
      NUMBER_OF_FRAMES-eng: 395
      NUMBER_OF_BYTES : 1320560
      NUMBER_OF_BYTES-eng: 1320560
      _STATISTICS_WRITING_APP: mkvmerge v16.0.0 ('Protest') 64-bit
      _STATISTICS_WRITING_APP-eng: mkvmerge v16.0.0 ('Protest') 64-bit
      _STATISTICS_WRITING_DATE_UTC: 2017-10-29 06:31:02
      _STATISTICS_WRITING_DATE_UTC-eng: 2017-10-29 06:31:02
      _STATISTICS_TAGS: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
      _STATISTICS_TAGS-eng: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
    Stream #0:2(eng): Subtitle: hdmv_pgs_subtitle
    Metadata:
      title           : English (SDH)
      BPS             : 0
      BPS-eng         : 0
      DURATION        : 00:00:00.000000000
      DURATION-eng    : 00:00:00.000000000
      NUMBER_OF_FRAMES: 0
      NUMBER_OF_FRAMES-eng: 0
      NUMBER_OF_BYTES : 0
      NUMBER_OF_BYTES-eng: 0
      _STATISTICS_WRITING_APP: mkvmerge v16.0.0 ('Protest') 64-bit
      _STATISTICS_WRITING_APP-eng: mkvmerge v16.0.0 ('Protest') 64-bit
      _STATISTICS_WRITING_DATE_UTC: 2017-10-29 06:31:02
      _STATISTICS_WRITING_DATE_UTC-eng: 2017-10-29 06:31:02
      _STATISTICS_TAGS: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
      _STATISTICS_TAGS-eng: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES


    


    Output File

    


    ffmpeg version 4.2.4-1ubuntu0.1 Copyright (c) 2000-2020 the FFmpeg developers
  built with gcc 9 (Ubuntu 9.3.0-10ubuntu2)
  configuration: --prefix=/usr --extra-version=1ubuntu0.1 --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --arch=amd64 --enable-gpl --disable-stripping --enable-avresample --disable-filter=resample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libaom --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libcodec2 --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libjack --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librsvg --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-lv2 --enable-omx --enable-openal --enable-opencl --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-nvenc --enable-chromaprint --enable-frei0r --enable-libx264 --enable-shared
  libavutil      56. 31.100 / 56. 31.100
  libavcodec     58. 54.100 / 58. 54.100
  libavformat    58. 29.100 / 58. 29.100
  libavdevice    58.  8.100 / 58.  8.100
  libavfilter     7. 57.100 /  7. 57.100
  libavresample   4.  0.  0 /  4.  0.  0
  libswscale      5.  5.100 /  5.  5.100
  libswresample   3.  5.100 /  3.  5.100
  libpostproc    55.  5.100 / 55.  5.100
Input #0, avi, from 'out3.avi':
  Metadata:
    title           : Planet Earth II S01E01 4K
    encoder         : Lavf58.29.100
  Duration: 00:00:04.27, start: 0.000000, bitrate: 44226 kb/s
    Stream #0:0: Video: rawvideo, bgr24, 3840x2160, 44803 kb/s, SAR 1:1 DAR 16:9, 47.95 fps, 47.95 tbr, 47.95 tbn, 47.95 tbc
    Stream #0:1: Audio: aac (LC) ([255][0][0][0] / 0x00FF), 48000 Hz, 5.1(side), fltp, 394 kb/s
    Metadata:
      title           : DTS-HD MA 5.1


    


    Command Log

    


    ffmpeg version 4.2.4-1ubuntu0.1 Copyright (c) 2000-2020 the FFmpeg developers
  built with gcc 9 (Ubuntu 9.3.0-10ubuntu2)
  configuration: --prefix=/usr --extra-version=1ubuntu0.1 --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --arch=amd64 --enable-gpl --disable-stripping --enable-avresample --disable-filter=resample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libaom --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libcodec2 --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libjack --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librsvg --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-lv2 --enable-omx --enable-openal --enable-opencl --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-nvenc --enable-chromaprint --enable-frei0r --enable-libx264 --enable-shared
  libavutil      56. 31.100 / 56. 31.100
  libavcodec     58. 54.100 / 58. 54.100
  libavformat    58. 29.100 / 58. 29.100
  libavdevice    58.  8.100 / 58.  8.100
  libavfilter     7. 57.100 /  7. 57.100
  libavresample   4.  0.  0 /  4.  0.  0
  libswscale      5.  5.100 /  5.  5.100
  libswresample   3.  5.100 /  3.  5.100
  libpostproc    55.  5.100 / 55.  5.100
[matroska,webm @ 0x55d6eebb8700] Could not find codec parameters for stream 2 (Subtitle: hdmv_pgs_subtitle (pgssub)): unspecified size
Consider increasing the value for the 'analyzeduration' and 'probesize' options
Input #0, matroska,webm, from 'PE2_Leopard_4K_hevc_dts.mkv':
  Metadata:
    title           : Planet Earth II S01E01 4K
    encoder         : libebml v1.3.5 + libmatroska v1.4.8
    creation_time   : 2017-10-29T06:31:02.000000Z
  Duration: 00:00:04.22, start: 0.000000, bitrate: 46848 kb/s
    Chapter #0:0: start 0.000000, end 4.216000
    Metadata:
      title           : 00:00:00.000
    Stream #0:0: Video: hevc (Main 10), yuv420p10le(tv, bt2020nc/bt2020/smpte2084), 3840x2160 [SAR 1:1 DAR 16:9], 23.98 fps, 23.98 tbr, 1k tbn, 23.98 tbc (default)
    Metadata:
      BPS             : 44365437
      BPS-eng         : 44365437
      DURATION        : 00:00:04.212000000
      DURATION-eng    : 00:00:04.212000000
      NUMBER_OF_FRAMES: 101
      NUMBER_OF_FRAMES-eng: 101
      NUMBER_OF_BYTES : 23358403
      NUMBER_OF_BYTES-eng: 23358403
      _STATISTICS_WRITING_APP: mkvmerge v16.0.0 ('Protest') 64-bit
      _STATISTICS_WRITING_APP-eng: mkvmerge v16.0.0 ('Protest') 64-bit
      _STATISTICS_WRITING_DATE_UTC: 2017-10-29 06:31:02
      _STATISTICS_WRITING_DATE_UTC-eng: 2017-10-29 06:31:02
      _STATISTICS_TAGS: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
      _STATISTICS_TAGS-eng: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
    Stream #0:1(eng): Audio: dts (DTS-HD MA), 48000 Hz, 5.1(side), s16p (default)
    Metadata:
      title           : DTS-HD MA 5.1
      BPS             : 2506995
      BPS-eng         : 2506995
      DURATION        : 00:00:04.214000000
      DURATION-eng    : 00:00:04.214000000
      NUMBER_OF_FRAMES: 395
      NUMBER_OF_FRAMES-eng: 395
      NUMBER_OF_BYTES : 1320560
      NUMBER_OF_BYTES-eng: 1320560
      _STATISTICS_WRITING_APP: mkvmerge v16.0.0 ('Protest') 64-bit
      _STATISTICS_WRITING_APP-eng: mkvmerge v16.0.0 ('Protest') 64-bit
      _STATISTICS_WRITING_DATE_UTC: 2017-10-29 06:31:02
      _STATISTICS_WRITING_DATE_UTC-eng: 2017-10-29 06:31:02
      _STATISTICS_TAGS: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
      _STATISTICS_TAGS-eng: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
    Stream #0:2(eng): Subtitle: hdmv_pgs_subtitle
    Metadata:
      title           : English (SDH)
      BPS             : 0
      BPS-eng         : 0
      DURATION        : 00:00:00.000000000
      DURATION-eng    : 00:00:00.000000000
      NUMBER_OF_FRAMES: 0
      NUMBER_OF_FRAMES-eng: 0
      NUMBER_OF_BYTES : 0
      NUMBER_OF_BYTES-eng: 0
      _STATISTICS_WRITING_APP: mkvmerge v16.0.0 ('Protest') 64-bit
      _STATISTICS_WRITING_APP-eng: mkvmerge v16.0.0 ('Protest') 64-bit
      _STATISTICS_WRITING_DATE_UTC: 2017-10-29 06:31:02
      _STATISTICS_WRITING_DATE_UTC-eng: 2017-10-29 06:31:02
      _STATISTICS_TAGS: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
      _STATISTICS_TAGS-eng: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
Output #0, avi, to 'output.avi':
  Metadata:
    INAM            : Planet Earth II S01E01 4K
    ISFT            : Lavf58.29.100
    Chapter #0:0: start 0.000000, end 4.216000
    Metadata:
      title           : 00:00:00.000
    Stream #0:0: Video: hevc (Main 10), yuv420p10le(tv, bt2020nc/bt2020/smpte2084), 3840x2160 [SAR 1:1 DAR 16:9], q=2-31, 23.98 fps, 23.98 tbr, 47.95 tbn, 47.95 tbc (default)
    Metadata:
      BPS             : 44365437
      BPS-eng         : 44365437
      DURATION        : 00:00:04.212000000
      DURATION-eng    : 00:00:04.212000000
      NUMBER_OF_FRAMES: 101
      NUMBER_OF_FRAMES-eng: 101
      NUMBER_OF_BYTES : 23358403
      NUMBER_OF_BYTES-eng: 23358403
      _STATISTICS_WRITING_APP: mkvmerge v16.0.0 ('Protest') 64-bit
      _STATISTICS_WRITING_APP-eng: mkvmerge v16.0.0 ('Protest') 64-bit
      _STATISTICS_WRITING_DATE_UTC: 2017-10-29 06:31:02
      _STATISTICS_WRITING_DATE_UTC-eng: 2017-10-29 06:31:02
      _STATISTICS_TAGS: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
      _STATISTICS_TAGS-eng: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
    Stream #0:1(eng): Audio: dts (DTS-HD MA) ([1] [0][0] / 0x2001), 48000 Hz, 5.1(side), s16p (default)
    Metadata:
      title           : DTS-HD MA 5.1
      BPS             : 2506995
      BPS-eng         : 2506995
      DURATION        : 00:00:04.214000000
      DURATION-eng    : 00:00:04.214000000
      NUMBER_OF_FRAMES: 395
      NUMBER_OF_FRAMES-eng: 395
      NUMBER_OF_BYTES : 1320560
      NUMBER_OF_BYTES-eng: 1320560
      _STATISTICS_WRITING_APP: mkvmerge v16.0.0 ('Protest') 64-bit
      _STATISTICS_WRITING_APP-eng: mkvmerge v16.0.0 ('Protest') 64-bit
      _STATISTICS_WRITING_DATE_UTC: 2017-10-29 06:31:02
      _STATISTICS_WRITING_DATE_UTC-eng: 2017-10-29 06:31:02
      _STATISTICS_TAGS: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
      _STATISTICS_TAGS-eng: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
Stream mapping:
  Stream #0:0 -> #0:0 (copy)
  Stream #0:1 -> #0:1 (copy)
Press [q] to stop, [?] for help
frame=  101 fps=0.0 q=-1.0 Lsize=   28904kB time=00:00:04.20 bitrate=56322.1kbits/s speed= 119x    
video:22811kB audio:1290kB subtitle:0kB other streams:0kB global headers:1kB muxing overhead: 19.929108%


    


    How to resolve this issue ?

    


  • what is the correct command using gstreamer to convert mp4 to 264 file ?

    25 mars 2020, par hilow

    My english is pool, i am sorry !

    I use ffmpeg and gstreamer convert mp4 file to 264 format, but the output file is different.
    The question is :

    • 1.Why they are different file ?

    • 2.What is the level mean in gst-discoverer-1.0 ?

      Use ffmpeg it is Codec:     video/x-h264, ...... level=(string)1.2.

      Use gstreamer it is Codec:     video/x-h264, ...... level=(string)3.

    • 3.How to use gstreamer to convert the correct 264 file ?

    The original video file is come from https://github.com/notedit/media-server-go-demo/blob/master/video-mixer/public/big_buck_bunny.mp4 .

    command :

    gst-launch-1.0 filesrc location=big_buck_bunny.mp4 ! \
    
    qtdemux name=demux \
    
      demux.video_0 ! queue ! \
    
      decodebin ! \
    
      videoconvert ! \
    
      videoscale ! \
    
      videorate ! \
    
      video/x-raw,width=320,height=240,framerate=15/1,pixel-aspect-ratio=1/1,level=1.2 ! \
    
      x264enc bframes=0 byte-stream=true bitrate=9000 ! \
    
      filesink location=videogst.264
    

    
ffmpeg -i big_buck_bunny.mp4 -f h264 -vcodec libx264 -s 320x240 -bf 0 -r 15 videoffmpeg.264

    output file :

    -rw-r--r-- 1 xxx staff 1.9M 3 25 13:39 videoffmpeg.264
    
-rw-r--r-- 1 xxx staff 17M 3 25 13:40 videogst.264

    video codec :

    xxx@xxxs-MacBook-Pro resource %  gst-discoverer-1.0 videoffmpeg.264 -v
    
Analyzing file:///Users/xxx/tool/resource/videoffmpeg.264
    
Done discovering file:///Users/xxx/tool/resource/videoffmpeg.264
    

    
Topology:
    
  video: video/x-h264, width=(int)320, height=(int)240, framerate=(fraction)15/1, chroma-format=(string)4:2:0, bit-depth-luma=(uint)8, bit-depth-chroma=(uint)8, parsed=(boolean)true, stream-format=(string)avc, alignment=(string)au, profile=(string)high, level=(string)1.2, codec_data=(buffer)0164000cffe100176764000cacb20283f420000003002000000303c1e2854901000668ebc3cb22c0
    
    Tags:
    
      视频编码: H.264 (High Profile)
    

    
    Codec:
    
      video/x-h264, width=(int)320, height=(int)240, framerate=(fraction)15/1, chroma-format=(string)4:2:0, bit-depth-luma=(uint)8, bit-depth-chroma=(uint)8, parsed=(boolean)true, stream-format=(string)avc, alignment=(string)au, profile=(string)high, level=(string)1.2, codec_data=(buffer)0164000cffe100176764000cacb20283f420000003002000000303c1e2854901000668ebc3cb22c0
    
    Additional info:
    
      None
    
    Stream ID: 349989c8845fcc23360fb0ab02ea7510051b926669bf8f3862879823fbab6daf
    
    Width: 320
    
    Height: 240
    
    Depth: 24
    
    Frame rate: 15/1
    
    Pixel aspect ratio: 1/1
    
    Interlaced: false
    
    Bitrate: 0
    
    Max bitrate: 0
    

    
Properties:
    
  Duration: 0:01:32.995000000
    
  Seekable: yes
    
  Live: no
    
  Tags:
    
      视频编码: H.264 (High Profile)
    

    

    
xxx@xxxs-MacBook-Pro resource % gst-discoverer-1.0 videogst.264 -v
    
Analyzing file:///Users/xxx/tool/resource/videogst.264
    
Done discovering file:///Users/xxx/tool/resource/videogst.264
    

    
Topology:
    
  video: video/x-h264, pixel-aspect-ratio=(fraction)1/1, width=(int)320, height=(int)240, framerate=(fraction)15/1, chroma-format=(string)4:2:0, bit-depth-luma=(uint)8, bit-depth-chroma=(uint)8, parsed=(boolean)true, stream-format=(string)avc, alignment=(string)au, profile=(string)high, level=(string)3, codec_data=(buffer)0164001effe1001d6764001eacb20283f602d4180416940000030004000003007a3c58b92001000568ebccb22c
    
    Tags:
    
      视频编码: H.264 (High Profile)
    

    
    Codec:
    
      video/x-h264, pixel-aspect-ratio=(fraction)1/1, width=(int)320, height=(int)240, framerate=(fraction)15/1, chroma-format=(string)4:2:0, bit-depth-luma=(uint)8, bit-depth-chroma=(uint)8, parsed=(boolean)true, stream-format=(string)avc, alignment=(string)au, profile=(string)high, level=(string)3, codec_data=(buffer)0164001effe1001d6764001eacb20283f602d4180416940000030004000003007a3c58b92001000568ebccb22c
    
    Additional info:
    
      None
    
    Stream ID: fb99f4104b347e5682d52c0bd65bcee91b765e42f89ce2e3553be5d6d743a666
    
    Width: 320
    
    Height: 240
    
    Depth: 24
    
    Frame rate: 15/1
    
    Pixel aspect ratio: 1/1
    
    Interlaced: false
    
    Bitrate: 0
    
    Max bitrate: 0
    

    
Properties:
    
  Duration: 0:01:45.505000000
    
  Seekable: yes
    
  Live: no
    
  Tags:
    
      视频编码: H.264 (High Profile)

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